blame: show "previous" information in --porcelain/--incremental format

diff --git a/exec_cmd.c b/exec_cmd.c
index 0f8f4b5b7d9dea4458b9944dd81cf98c2e9a1322..cdd35f91954bdc751455e1083a0612a21eeadc67 100644 (file)
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -4,8 +4,23 @@
 #define MAX_ARGS       32
 
 extern char **environ;
-static const char *builtin_exec_path = GIT_EXEC_PATH;
 static const char *argv_exec_path;
+static const char *argv0_path;
+
+const char *system_path(const char *path)
+{
+       if (!is_absolute_path(path) && argv0_path) {
+               struct strbuf d = STRBUF_INIT;
+               strbuf_addf(&d, "%s/%s", argv0_path, path);
+               path = strbuf_detach(&d, NULL);
+       }
+       return path;
+}
+
+void git_set_argv0_path(const char *path)
+{
+       argv0_path = path;
+}
 
 void git_set_argv_exec_path(const char *exec_path)
 {
@@ -26,7 +41,7 @@ const char *git_exec_path(void)
                return env;
        }
 
-       return builtin_exec_path;
+       return system_path(GIT_EXEC_PATH);
 }
 
 static void add_path(struct strbuf *out, const char *path)
@@ -35,23 +50,21 @@ static void add_path(struct strbuf *out, const char *path)
                if (is_absolute_path(path))
                        strbuf_addstr(out, path);
                else
-                       strbuf_addstr(out, make_absolute_path(path));
+                       strbuf_addstr(out, make_nonrelative_path(path));
 
-               strbuf_addch(out, ':');
+               strbuf_addch(out, PATH_SEP);
        }
 }
 
-void setup_path(const char *cmd_path)
+void setup_path(void)
 {
        const char *old_path = getenv("PATH");
-       struct strbuf new_path;
-
-       strbuf_init(&new_path, 0);
+       struct strbuf new_path = STRBUF_INIT;
 
        add_path(&new_path, argv_exec_path);
        add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
-       add_path(&new_path, builtin_exec_path);
-       add_path(&new_path, cmd_path);
+       add_path(&new_path, system_path(GIT_EXEC_PATH));
+       add_path(&new_path, argv0_path);
 
        if (old_path)
                strbuf_addstr(&new_path, old_path);
@@ -63,7 +76,7 @@ void setup_path(const char *cmd_path)
        strbuf_release(&new_path);
 }
 
-int execv_git_cmd(const char **argv)
+const char **prepare_git_cmd(const char **argv)
 {
        int argc;
        const char **nargv;
@@ -76,6 +89,11 @@ int execv_git_cmd(const char **argv)
        for (argc = 0; argv[argc]; argc++)
                nargv[argc + 1] = argv[argc];
        nargv[argc + 1] = NULL;
+       return nargv;
+}
+
+int execv_git_cmd(const char **argv) {
+       const char **nargv = prepare_git_cmd(argv);
        trace_argv_printf(nargv, "trace: exec:");
 
        /* execvp() can only ever return if it fails */